Research On Dense Multi-view Image Generation Algorithm And Moire Simulation Algorithm Based On Ray Tracing Technique

Auto-stereoscopic display technology is one of the most attractive directions in 3D display technology.However,due to the large amount of calculations required for rendering the multi-view images for the auto-stereoscopic display technology,the multi-view images generation rate is restrained and the development of the free stereo display technology is limited.On the other hand,periodic optical elements such as gratings and periodic structures such as lightning units of liquid crystal displays are commonly used in auto-stereoscopic display technology that might overlap with each other,which results in moire pattern.To solve these problems,a computer-generated multi-view images method based on ray tracing technology and a moire pattern simulation method based on ray tracing technology are proposed.To accelerate the generation of multi-view images,the concept of region of interest is introduced,the pixel amount rendered in each frame is greatly reduced,and the rendering efficiency is greatly improved.Experimental result shows that the generating process can be accelerated to be 2?9 times faster and can meets the real-time demand with a resolution of 3840x2160.Backward ray-tracing technology is also introduced simulate moire pattern in optical systems,and complicated analysis and calculation processes and unnecessary design verification costs are avoided.The experiment proves that a good simulation result is achieved.Not only the result has a high degree of reduction visually,but also the structural similarity between the simulation picture and the real picture is improved to above 0.9.The technical route and main research content and innovation are summarized as follows:1.A multi-viewpoint image generation system based on ray-tracing technique is implemented.CUDA-based parallel ray tracing technology is utilized in the system,which can make full use of the GPU's parallel computing capabilities to render three-dimensional scenes efficiently.In addition,the system's display parameters can be set flexibly to adapt to different auto-stereoscopic display devices with different parameters.With this system,a multi-view image generation acceleration algorithm based on ray tracing technology and regions of interest is proposed to further accelerate the generation of multi-view images.Only the changed parts of the scenes are detected and re-rendered.A lot of unnecessary calculations are avoided can and the generation frame rate of multi-view images is greatly improved.Finally,a high-quality real-time interactive three-dimensional display system with an output frame rate of more than 40fps at 4K resolution was implemented.2.A moire pattern simulation algorithm for 3D displays based on ray tracing technology is proposed.The construction methods and the simulation solution of the scene components and optical system are described in detail.Photo of the pixels are introduced to model the lightning unit.A relatively high-quality physically-based rendering system for simulating moire pattern in 3D display device is constructed.Experiments show that the structural similarity between simulation results and real shot results can reach above 0.9.This algorithm provides powerful assistance for design of optical systems.In summary,an algorithms for multi-viewpoint rendering acceleration and a visualization tool for moire pattern minimization of 3D display system are described.A new solution for the design and application of real-time interactive high-quality 3D display systems is provided.